expmed.c (expand_divmod): Cast constant to unsigned HOST_WIDE_INT before negating.

	* expmed.c (expand_divmod) [TRUNC_MOD_EXPR, TRUNC_DIV_EXPR]: Cast
	constant to unsigned HOST_WIDE_INT before negating.

From-SVN: r120995

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d5eb9aec6864289ff642745a1e2a5ac189412b74..97483ccc293489867cb2db5085eb269933b93aef 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2007-01-19  Ian Lance Taylor  <iant@google.com>
+
+       * expmed.c (expand_divmod) [TRUNC_MOD_EXPR, TRUNC_DIV_EXPR]: Cast
+       constant to unsigned HOST_WIDE_INT before negating.
+
 2007-01-19  Ian Lance Taylor  <iant@google.com>
 
        * tree-ssa-operands.h (struct vuse_vec_d): Change num_vuse field

diff --git a/gcc/expmed.c b/gcc/expmed.c
index e12fdfbb103464f6eb78a03b2c842e99641992e7..58b6a635a6a49ce2fa642f3eee73912e1b398ebd 100644 (file)
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -1,7 +1,7 @@
 /* Medium-level subroutines: convert bit-field store and extract
    and shifts, multiplies and divides to rtl instructions.
    Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
+   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
    Free Software Foundation, Inc.
 
 This file is part of GCC.
@@ -4174,7 +4174,9 @@ expand_divmod (int rem_flag, enum tree_code code, enum machine_mode mode,
                int lgup, post_shift;
                rtx mlr;
                HOST_WIDE_INT d = INTVAL (op1);
-               unsigned HOST_WIDE_INT abs_d = d >= 0 ? d : -d;
+               unsigned HOST_WIDE_INT abs_d;
+
+               abs_d = d >= 0 ? d : - (unsigned HOST_WIDE_INT) d;
 
                /* n rem d = n rem -d */
                if (rem_flag && d < 0)